Process of making aromatic carbonyl derivatives.



20 producible by 25 their sulfo-acids and salts thereof, are mi 40 variety thereof.

UNITED STATES PATENT OFFICE. ADOLF WAOK, BELLEVILLE, NEVliTEIlSEY, ASSIGNOR TO VERONA CHEMICAL COMPANY,

' OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY- PROCESS OF MAmG AROMATIC CARBONYL DERIVATIVES.

Specification of Letters Patent.

Patented se als, 1906.

Application filed July 2, 1907. Serial). 381,835.,

of New Jersey, have invented new and-useful Improvements in the Manufactpre of Aromatic Carbonyl Derivatives, of which the following is a specification,

-In the production of aromatic aldehydes and aromatic ketones, hereinafter generically called aromatic carbonyl derivatives, by oxidation the amount of the desired aromatic carbonyl derivatives produced is generally much below that amount theoretically pos sible. 0

The object of the present invention 15 toprovide means of increasing the amount of aromatic carbonyl derivative producediby oxidation beyond that amount heretofore this invention.

Now, I have discovered thatwhen certa n substances, which are primary aromatic amino substances inclusive of their salts:i

xe with the material to be oxidized to form an aromatic carbonyl derivative, the amount of the latter which is producedupon oxidation of the mixtiire is greater than when such priso mary aromatic animo substances (hereinafter generically termed primary aromatic amino substances) are not employed.

Among the rimary aroniatic amino substances which T have employed in the practree of this, my, invention are: anilin; anilin sulfoecid, articular] y the para-va riety thereof; napht iylamin particularly the alphavariety thereof an naphthyla nin sulfo ac d particularly the '1.naphthylanunA.sulfo acid These may be employed as free base, free acid or salt of baso or salt of acid without materially affecting the result. The oxidizing agents which have been found to be most favorably influenced thereby are the acid oxidizing agents and particularl such as produce no undissolved materia in the course of their action and more particularly sodium bichromate andsulfuric acid or chromic acid and acetic 'acid, or an of their well-known equivalents.

Other .mo es of oxidation, for example, such' as employ a permanganate in acid, alkaline condition of electrolytic methods or'neutra of OXtdatlOIl or sub as involve theuse of ozone also have the percentage amount of oxidation withoutthe aid of' aromatic carbonyl derivative produceclby them favorably afi'ected by the addition of the aforementioned aromatic amino -'substance to the material to be oxidized.

Among the aromatic carbonyl derivatives whose percentage amount of production by oxidation is favorably influenced by the use of my invention I mention vanillin, acid vlvanillin, particularly the acetyI variety thereof, camphor, heliotr'opin, anisic aldehyde.

The initial material to be oxidized into aromatic carbonyl derivative may be any of the materials suitable for the production of such aromatic carbonyl derivative such as, for example, (a) aroniatiq substances with unsaturated fatty side chain as: isosafrol, acetisoeugenol, anethol'; (b) cyclic secondary aromatic alcoholssu'ch as borneoi, inclusive of its esters especially its acetic acid estors, iso-borneol', inclusive of its esters es ially its acetic acid ester, all of which are hereinafter generically referred to as aromatic substances. 1

*The following examples will serve as: practical illustration of. a way in which my invention may be practiced but I, of comic,

do not.regard my invention as limited to the exact qluantitles, proportions or conditions set forti since these may be varied within wide limits without departing from my vention and because thefavorable influence of my invention is discernible in all ordinary conditions of proportion, "quantities and strengths. The arts are by weight:

Preparation of .occtyl t'aniIZin.-Mix logather one hundred (100) parts of acetvlisoeugenol, thirty (30) parts of sulf acid, fifteen hundred (1500) arts of water and ra'ise the temperaturco the resulting mixture to the melting point of the acetylisocugonol which is about eighty degrees centigrade; when all the acct liso eugenol k melted add to this mixture s owly and in a fine stream a mixture of two hundred and fifty (2.50) parts of sodium bichromate, four hundred (400) parts of water, two hundred and fifty (250) parts of sulfuric acid' of ninety-five per cent. H 50 while keeping the temperature of the resulting mixture between seventy-four (74) degrees and seventy-eight (78) degrees centigrade; the time for admixture of the oxidizing at with the material to be oxidized shoal ordinarily not be more than forty (40) minutes;

solution of fifteen parts of sulfanilic acid now maintain the temperature of the mixture between seventy-four (74) and seventyei ht (78) degrees centigrade for about five (53 to ten (10) minutes longer at the end of which time the production of acetyl vanillin is ordinarily completed and the product may .be isolated in any suitable manner.

Preparation of 'camphor.Dissolve fifty (50) parts of isoborneol in one hundred (100) parts of benzol; intimatelymix therewith a in fiye hundred (500) arts of water; heat this mixture in a vesse provided with a re turn condenser to the boiling point of the 15.

benzol and while stirring the mixture thoroughly add continuously a mixture made u of one hundred (100) parts of sodium bichromate, twohundred (200) parts of wat(r and one hundred (100) parts of "sulfuric acid of ninety-five (95 per cent. H SO, insuch In practice in this manner i The manufacture of camphor above re-- ferred to is not herein specifically claimed as the right to such claim is reserved for another application, said divisional application being filed 27 December 1907 and num bored 408,331. a

Now what I claim is:

1. The improvement in the manufacture of a hereinbefore defined aromatic carbonyl derivative which consists in submitting a mixture containing a hereinbefore defined primary aromatic amino-substance and a ercinbefo're defined aromatic substance to oxidation.

2. The improvement in the manufacture ofacetyl vanillin which consists in submitting a mixture of ecetylisoeugenol and a hereinbefore defined primary aromatic amino substance to oxidation;

3. The improvement in the manufacture of acetyl-vanillin which consists in submittin a mixture of acetylisoeugenol and sulfani ic acid to oxidation.

In testimony whereof I have hereunto set myhand in the presenceof two subscribing witnesses.

ADOLF WnCK.

Witnesses:

W; C. HAUFF,

EDWIN Ko'rrnosr. 

